Pre-tightening force monitoring and applying system for steel wire rope of hoisting mechanism

Abstract

The utility model discloses a hoisting mechanism steel wire rope pretightening force monitoring and applying system which comprises an unwinding mechanism and a measuring mechanism, the unwinding mechanism comprises an unwinding winding drum and an unwinding motor, and an unwinding encoder is installed at the tail end of the unwinding motor; the measuring mechanism comprises a rope inlet wheel assembly, a force feedback rope wheel assembly and a speed measuring wheel assembly which are sequentially installed. The force feedback rope wheel assembly is provided with a shaft pin sensor, and the tachometer wheel assembly is provided with a rope guide wheel encoder; the unwinding motor, the unwinding encoder and the shaft pin sensor are all electrically connected with the frequency converter, the frequency converter is electrically connected with the controller, and the controller is further electrically connected with the rope guide wheel encoder and the upper computer. According to the utility model, the unwinding motor is adopted to directly apply the resistance torque to the unwinding drum, so that the pre-tightening force is applied to the steel wire rope, the resistance torque is controllable in real time, the pre-tightening force applied to the steel wire rope can be effectively ensured to be kept relatively constant, and the fluctuation deviation of the pre-tightening force is relatively small.

Description

Technical Field

[0001] The utility model relates to the technical field of steel wire rope pre-tightening, in particular to a steel wire rope pre-tightening force monitoring and applying system for a hoisting mechanism. Background Art

[0002] Wire rope is an important part of lifting machinery and equipment. Insufficient pre-tension of wire rope will lead to knotting, rope embedding and wear during lifting. When the rope is embedded, the wire rope may bounce during equipment lifting, causing impact on the wire rope and the main structure of the equipment, affecting the construction safety of the lifting equipment and the personal safety of personnel. Among them, insufficient pre-tension of wire rope is one of the important factors that directly affect the life of wire rope. At present, the mainstream preload force applying devices are mainly: 1. Relying on the friction force given by the braking mechanism to provide preload force. This method cannot provide real-time and accurate preload force. The preload force is adjusted by the operator based on experience and is highly subjective. The preload force of the wire rope cannot be monitored in real time. When a large deviation occurs, timely intervention cannot be made. The real-time preload force of the wire rope cannot be accurately controlled, and the preload effect is random and uncertain. In actual operation, the braking components that provide friction force often have the disadvantages of easy wear and heat generation; 2. The solution of relying on equipment lifting to provide wire rope preload force can provide sufficiently large preload force, but in addition to the above disadvantages, it is also limited by equipment and site, and in most cases does not have the conditions for mass production.

[0003] For example, the Chinese utility model patent with application number 20111002338.5 discloses a wire rope pre-tensioning device, including: a pre-tensioning drum for winding and holding a wire rope; and a braking system connected to the pre-tensioning drum to apply a pre-tensioning torque to the pre-tensioning drum. The wire rope pre-tensioning device can provide a pre-tensioning force to the wire rope that is about to be wound on the drum of the lifting mechanism, so that the wire rope is not easy to be tangled during operation, thereby extending the service life of the wire rope. The pre-tensioning method of this scheme is actually basically the same as the first type of scheme mentioned above, and mainly relies on the braking friction of the rotating pliers to apply the pre-tensioning force to the wire rope.

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the present application provides a method in which the pre-tensioning force can be set according to actual needs, the size can be controlled in real time, and the wire rope length and pre-tensioning force size data can be traced, so that the wire rope pre-tensioning process can be used for mass production and is suitable for various manufacturers of lifting equipment with wire ropes. Utility Model Content

[0005] The utility model aims to provide a system for monitoring and applying pre-tensioning force of a wire rope of a hoisting mechanism, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A system for monitoring and applying pre-tensioning force of a wire rope of a lifting mechanism comprises a unwinding mechanism and a measuring mechanism, wherein the unwinding mechanism comprises an unwinding drum and an unwinding motor for applying a resistance torque to the unwinding drum, and an unwinding encoder for detecting the angular displacement of an output shaft of the unwinding motor is installed at the end of the unwinding motor; the measuring mechanism comprises a rope entry wheel assembly, a force feedback rope wheel assembly and a speed measuring wheel assembly which are installed in sequence, and the wire rope released by the unwinding drum passes around the rope entry wheel assembly, the force feedback rope wheel assembly and the speed measuring wheel assembly in sequence, and is finally wound on the lifting drum of the lifting mechanism; the force feedback rope wheel assembly has an axle pin sensor for detecting the pre-tensioning force of the wire rope, and the speed measuring wheel assembly has a guide rope wheel encoder for detecting the linear speed of the wire rope; the unwinding motor, the unwinding encoder and the axle pin sensor are all electrically connected to the frequency converter, the frequency converter is electrically connected to the controller, and the controller is also electrically connected to the guide rope wheel encoder and the host computer respectively.

[0008] Preferably, the unwinding mechanism also includes an unwinding frame, the unwinding drum is rotatably mounted on the unwinding frame, the unwinding motor is fixedly mounted at the end of the unwinding frame, and the output end of the unwinding motor is drivingly connected to the shaft end of the unwinding drum through a coupling assembly, and the unwinding motor is also configured with an electromagnetic brake.

[0009] Preferably, the lifting mechanism further comprises a lifting frame, the lifting drum is rotatably mounted on the lifting frame, the lifting motor is fixedly mounted at the end of the lifting frame, and the output end of the lifting motor is drive-connected to the shaft end of the lifting drum.

[0010] Preferably, it also includes an unwinding transverse movement mechanism for driving the unwinding mechanism to move axially along the unwinding drum and a lifting transverse movement mechanism for driving the lifting mechanism to move axially along the lifting drum;

[0011] The unwinding transverse movement mechanism and the lifting transverse movement mechanism adopt the transverse movement mechanism with the same structure, which includes a transverse movement chassis, a transverse movement driving motor installed at the end of the transverse movement chassis, and a transverse movement lead screw rotatably installed on the transverse movement chassis, and the output end of the transverse movement driving motor is drivingly connected to the end of the transverse movement lead screw;

[0012] The unwinding frame of the unwinding mechanism is slidably matched on the corresponding transverse moving base frame, and a nut seat is installed at the bottom of the unwinding frame, and the nut seat is sleeved on the corresponding transverse moving lead screw through thread matching;

[0013] The hoisting frame of the hoisting mechanism is slidably matched on the corresponding transverse moving base frame, and a nut seat is installed at the bottom of the hoisting frame, and the nut seat is sleeved on the corresponding transverse moving screw through thread matching.

[0014] Preferably, the measuring mechanism comprises a measuring frame, on which a plurality of fixed supports are fixedly mounted, and a sliding seat plate is slidably mounted on the measuring frame, on which a plurality of movable supports corresponding to the fixed supports are fixedly mounted;

[0015] The rope entry wheel assembly comprises a rope entry wheel disc, one end of the central axis of the rope entry wheel disc is limitedly inserted in a corresponding fixed support, and the other end of the central axis of the rope entry wheel disc is movably inserted in a corresponding movable support;

[0016] The force feedback sheave assembly comprises a force feedback wheel disc, the center of which is sleeved on the shaft pin sensor, one end of the shaft pin sensor is limitedly inserted in a corresponding fixed support, and the other end of the shaft pin sensor is movably inserted in a corresponding movable support;

[0017] The tachometer wheel assembly includes a tachometer wheel disc, one end of the central axis of the tachometer wheel disc is limitedly inserted in a corresponding fixed support, the other end of the central axis of the tachometer wheel disc is movably inserted in a corresponding movable support, and a guide rope wheel encoder is installed on the side wall at a corresponding position of the fixed support to detect the angular displacement of the central axis of the tachometer wheel disc.

[0018] Preferably, an installation slot is provided on the measuring frame, a sliding screw is rotatably installed in the installation slot, a sliding drive motor is also fixedly installed at the end of the measuring frame, the output end of the sliding drive motor is drivingly connected to the end of the sliding screw, the sliding screw is threadedly fitted on a sliding nut seat, and the sliding nut seat is fixedly installed on the lower end of the sliding seat plate.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The preload monitoring and applying system of the utility model has a reasonable structural design. Compared with the prior art, the overall preload mechanism is relatively simpler, which can greatly reduce the workload of manual winding before the process is executed. The unwinding motor is used to directly apply a resistance torque to the unwinding drum, thereby applying a preload force to the wire rope. The size of the resistance torque can be controlled in real time. It is not only suitable for the preload of different types of wire ropes, but also can effectively ensure that the preload force applied to the wire rope remains relatively constant, the fluctuation deviation is relatively small, and it has a good preload effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a lifting mechanism wire rope preload monitoring and applying system from a first viewing angle;

[0022] Figure 2 A schematic diagram of the three-dimensional structure of a lifting mechanism wire rope preload monitoring and application system from a second viewing angle;

[0023] Figure 3 It is a side structural schematic diagram of a hoisting mechanism wire rope preload monitoring and applying system during operation;

[0024] Figure 4 It is a structural block diagram of a lifting mechanism wire rope preload monitoring and application system;

[0025] Figure 5 The figure is a specific network diagram of a lifting mechanism wire rope pre-tensioning force monitoring and application system.

[0026] In the figure: 100-host computer, 101-controller, 102-frequency converter, 1-unwinding mechanism, 11-unwinding frame, 12-unwinding motor, 13-unwinding encoder, 14-unwinding reel, 15-coupling assembly, 2-measuring mechanism, 21-measuring frame, 211-installation slot, 212-sliding screw, 213-sliding drive motor, 214-sliding nut seat, 22-fixed support, 23-guide rope wheel encoder, 24-rope feeding wheel, 25-force feedback wheel, 26-speed measuring wheel, 27-axle pin sensor, 28-rope guide wheel encoder, 29-sliding seat plate, 291-movable support, 3-lifting mechanism, 31-lifting drum, 32-lifting motor, 33-lifting frame, 4-unwinding transverse movement mechanism, 41-transverse movement base frame, 42-transverse movement drive motor, 43-transverse movement screw, 44-nut seat, 5-lifting transverse movement mechanism, 6-wire rope. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figures 1 to 5 A system for monitoring and applying pretensioning force of a steel wire rope of a lifting mechanism comprises an unwinding mechanism 1 and a measuring mechanism 2. The unwinding mechanism 1 comprises an unwinding drum 14 and an unwinding motor 12 for applying a resistance torque to the unwinding drum 14. An unwinding encoder 13 for detecting the angular displacement of an output shaft of the unwinding motor 12 is installed at the end of the unwinding motor 12. Figure 5 As shown, the unwinding encoder 13 can specifically adopt an incremental encoder, and the incremental encoder can specifically communicate with the frequency converter 102 through an incremental PG card. Through the detected angular displacement information, the number of revolutions of the unwinding reel 14, the current real-time rotation speed and other data can be calculated;

[0029] The measuring mechanism 2 includes a rope entry wheel assembly, a force feedback rope wheel assembly and a speed measuring wheel assembly which are sequentially installed. The wire rope 6 released by the unwinding drum 14 sequentially passes around the rope entry wheel assembly, the force feedback rope wheel assembly and the speed measuring wheel assembly, and is finally wound on the lifting drum 31 of the lifting mechanism 3.

[0030] The force feedback sheave assembly has an axle pin sensor 27 for detecting the pre-tightening force of the wire rope 6, and the speed measuring wheel assembly has a guide rope wheel encoder 28 for detecting the linear velocity of the wire rope 6. The angular displacement information detected by the guide rope wheel encoder 28 can be used to calculate the number of revolutions of the speed measuring wheel assembly, the current real-time rotation speed and other data, thereby knowing the current linear velocity of the wire rope 6;

[0031] The unwinding motor 12, the unwinding encoder 13 and the axle pin sensor 27 are all electrically connected to the frequency converter 102, the frequency converter 102 is electrically connected to the controller 101, and the controller 101 is also electrically connected to the guide rope wheel encoder 28 and the host computer 100. During the process of applying the pre-tightening force of the wire rope, the frequency converter 102 automatically controls the frequency conversion of the unwinding motor 12 to output the corresponding resistance torque, so that the pre-tightening force transmitted to the wire rope 6 can be kept relatively constant. At the same time, the host computer 100 displays the detected operating data in real time, and realizes real-time monitoring of the process of applying the pre-tightening force of the wire rope 6.

[0032] As a specific solution, the unwinding mechanism 1 also includes an unwinding frame 11, an unwinding drum 14 is rotatably mounted on the unwinding frame 11, an unwinding motor 12 is fixedly mounted on the end of the unwinding frame 11, and the output end of the unwinding motor 12 is drive-connected to the shaft end of the unwinding drum 14 through a coupling assembly 15, so as to facilitate the disassembly and assembly of the unwinding drum 14 wound with steel wire ropes of different specifications and models. The unwinding motor 12 is also equipped with a 24V electromagnetic brake, which can provide a stable braking torque to the unwinding drum 14 during system pause. Obviously, the maximum braking torque of the electromagnetic brake should be greater than the preload torque applied to the steel wire rope 6, which can ensure that the steel wire rope 6 is in a taut state during the pause of the inverter 102 output (the steel wire rope 8 has a preload force at this time), and can also avoid directly using the unwinding motor 12 for braking to generate large heat and power consumption.

[0033] As a specific solution, the lifting mechanism 3 also includes a lifting frame 33, a lifting drum 31 is rotatably mounted on the lifting frame 33, a lifting motor 32 is fixedly mounted at the end of the lifting frame 33, and the output end of the lifting motor 32 is drive-connected to the shaft end of the lifting drum 31.

[0034] In order to make the projection of the wire rope between the unwinding end, the winding end and the measuring mechanism 2 on the horizontal plane be in a straight line and reduce the fluctuation deviation of the application of the preload force, the present embodiment further includes an unwinding transverse movement mechanism 4 for driving the unwinding mechanism 1 to move axially along the unwinding drum 14 and a lifting transverse movement mechanism 5 for driving the lifting mechanism 3 to move axially along the lifting drum 31;

[0035] The unwinding transverse movement mechanism 4 and the lifting transverse movement mechanism 5 adopt the transverse movement mechanism with the same structure, which includes a transverse movement chassis 41, a transverse movement driving motor 42 installed at the end of the transverse movement chassis 41, and a transverse movement lead screw 43 rotatably installed on the transverse movement chassis 41, and the output end of the transverse movement driving motor 42 is drivingly connected to the end of the transverse movement lead screw 43;

[0036] The unwinding frame 11 of the unwinding mechanism 1 is slidably fitted on the corresponding transverse base frame 41, and a nut seat 44 is installed at the bottom of the unwinding frame 11, and the nut seat 44 is threadedly fitted on the corresponding transverse screw 43; in the process of applying pre-tightening force to the wire rope 6, every time the unwinding drum 14 rotates one circle, the transverse drive motor 42 drives the unwinding mechanism 1 to move axially along the unwinding drum 14 a unit distance (which can be specifically set to the diameter size of the wire rope 6), thereby ensuring that the projection of the wire rope between the unwinding end and the measuring mechanism 2 on the horizontal plane is on a straight line.

[0037] The hoist frame 33 of the hoisting mechanism 3 is slidably fitted on the corresponding transverse base frame 41, and a nut seat 44 is installed at the bottom of the hoist frame 33, and the nut seat 44 is sleeved on the corresponding transverse screw 43 through threaded fitting. In the process of applying pre-tightening force to the wire rope 6, the transverse drive motor 42 drives the hoisting mechanism 3 to move a unit distance (which can be specifically set to the diameter size of the wire rope 6) along the axial direction of the hoisting drum 31 every time the hoisting drum 31 rotates one circle, thereby ensuring that the projection of the wire rope between the winding end and the measuring mechanism 2 on the horizontal plane is on a straight line.

[0038] As a specific solution, the measuring mechanism 2 includes a measuring frame 21, on which a plurality of fixed supports 22 are fixedly mounted, and a sliding seat plate 29 is also slidably mounted on the measuring frame 21, on which a plurality of movable supports 291 corresponding to the fixed supports 22 are fixedly mounted;

[0039] The rope entry wheel assembly includes a rope entry wheel disc 24, one end of the central axis of the rope entry wheel disc 24 is limitedly inserted in the corresponding fixed support 22, and the other end of the central axis of the rope entry wheel disc 24 is movably inserted in the corresponding movable support 291;

[0040] The force feedback pulley assembly includes a force feedback wheel 25, the center of which is mounted on an axle pin sensor 27, one end of which is limitedly inserted in a corresponding fixed support 22, and the other end of the axle pin sensor 27 is movably inserted in a corresponding movable support 291; the axle pin sensor 27 can detect the real-time pressure borne by the force feedback wheel 25 in real time, and the real-time pressure minus the self-gravity of the force feedback wheel 25 is the resultant force of the preload force in two directions (the tension F of the wire rope 6).

[0041] The tachometer wheel assembly includes a tachometer wheel disc 26, one end of the central axis of the tachometer wheel disc 26 is limitedly inserted in the corresponding fixed support 22, and the other end of the central axis of the tachometer wheel disc 26 is movably inserted in the corresponding movable support 291, and the guide wheel encoder 28 is installed on the side wall of the corresponding position of the fixed support 22, which is used to detect the angular displacement of the central axis of the tachometer wheel disc 26. Obviously, the outer periphery of the rope input wheel disc 24, the force feedback wheel disc 25 and the tachometer wheel disc 26 are all provided with an annular rope groove for matching the diameter size of the wire rope 6.

[0042] For steel wire ropes 6 of different models and diameters, the user can open the movable support 291 to replace the rope entry wheel 24, the force feedback wheel 25 and the speed measuring wheel 26 with corresponding annular rope groove sizes.

[0043] In order to facilitate the replacement and assembly of the rope input wheel 24, the force feedback wheel 25 and the speed measuring wheel 26, an installation slot 211 is opened on the measuring frame 21, and a sliding screw 212 is rotatably installed in the installation slot 211. A sliding drive motor 213 is also fixedly installed at the end of the measuring frame 21. The output end of the sliding drive motor 213 is drivingly connected to the end of the sliding screw 212. The sliding screw 212 is threadedly fitted with a sliding nut seat 214, and the sliding nut seat 214 is fixedly installed at the lower end of the sliding seat plate 29.

[0044] The sliding drive motor 213 rotates forward, and drives the movable support 291 to move away from the fixed support 22 through the sliding screw 212 and the sliding nut seat 214. At this time, the user can disassemble and replace the rope entry wheel 24, the force feedback wheel 25 and the speed measuring wheel 26; after the replacement is completed, the sliding drive motor 213 reverses, and drives the movable support 291 to move closer to the fixed support 22 through the sliding screw 212 and the sliding nut seat 214, thereby stably supporting the rope entry wheel 24, the force feedback wheel 25 and the speed measuring wheel 26.

[0045] In the present utility model, the host computer 100 may specifically include a central processing unit, an input module, a display and a memory, the input module may specifically include a keyboard, a mouse, a control button, etc., and the control button may specifically include a power button, an automatic operation start button, an automatic operation stop button, a jog forward button, a jog reverse button, an emergency stop button, etc. In case of continuous operation or no need to change system parameters, the control button can be quickly operated; an emergency stop button is set to ensure that the equipment can be quickly powered off and stopped in an emergency to ensure the safety of personnel and equipment.

[0046] The display can be used to display the wire rope related parameters that need to be input by the user. The wire rope related parameters can specifically include: tower crane model, wire rope model, wire rope length, wire rope diameter, given preload, barrel diameter of the unwinding drum 14 and other parameters; for different wire rope specifications and lengths, the operator can quickly change the system parameter settings according to different requirements and enable the main system parameters including tower crane lifting mechanism model, wire rope diameter, wire rope length, preload size, etc.

[0047] During operation, the display can also be used to display the real-time preload, line speed, wound length, given preload, real-time deviation and other parameters of the current wire rope 6; the host computer supports real-time parameter monitoring function, which can detect the system preload, wire rope line speed, wound length, and preload implementation deviation in real time, and set buttons for starting, pausing, and exiting the rope winding program.

[0048] The memory can be used to save the operation log of the host computer, record the log information of each lifting mechanism model, wire rope specification, preload force, rope winding time, rope winding length, etc., and provide review and record export functions to facilitate product tracking records.

[0049] The specific use steps of the utility model are:

[0050] S1. Install an unwinding drum 14 wound with a steel wire rope 6 on the unwinding frame 11, connect the shaft end of the unwinding drum 14 to the output end of the unwinding motor 12 through a coupling assembly 15, and the upper computer 100 receives steel wire rope related parameters input by the user;

[0051] S2, the host computer 100 receives the user's inching control command, controls the unwinding motor 12 to inching through the controller 101 and the frequency converter 102, and performs the unwinding or rewinding operation;

[0052] S3, the unwinding wire rope 6 is passed around the rope input wheel 24, the force feedback wheel 25 and the speed measuring wheel 26 in sequence, and the end of the wire rope 6 is fixed on the lifting drum 31 of the lifting mechanism 3;

[0053] S4, observe whether the wire rope 6 is tight, if the wire rope 6 is tight, proceed to the next step; if the wire rope 6 is still loose, perform the winding operation of step S2 until the wire rope 6 is tight;

[0054] S5, the host computer 100 receives the user's automatic operation command, controls the electromagnetic brake of the unwinding motor 12 through the controller 101 and the frequency converter 102, performs the braking operation on the unwinding reel 14, and the system is ready;

[0055] S6. The lifting motor 32 of the lifting mechanism 3 is started, and the lifting motor 32 drives the lifting drum 31 to perform the winding operation. In specific implementation, the operator can specifically operate the tower crane lifting lever, and the tower crane controller controls the lifting motor 32 to start, and perform the winding or unwinding operation of the lifting drum 31.

[0056] S7. Based on the feedback information from the axle pin sensor 27, the unwinding encoder 13, the guide rope encoder 23 and the input wire rope related parameters, the inverter automatically controls the unwinding motor 12 to output the corresponding resistance torque, so that the preload force transmitted to the wire rope 6 can be kept relatively constant, and the unwinding drum 14 performs the unwinding operation under the pulling of the lifting mechanism 3. At the same time, the upper computer 100 displays the detected operating data in real time until the wire rope 6 of the unwinding drum 14 is completely unwound.

[0057] During the specific implementation process, the solution of the utility model is adopted to apply and monitor the preload force of the wire rope 6. It is verified that within the system dynamic response time of 2s, the real-time preload force applied can reach 90% of the given preload force. After running for 10s, it can enter a steady state and reach 100% of the given preload force, and converge within a controllable oscillation range. According to the normal winding line speed of about 0.5m / s, the travel of the wire rope within 2s is 1m, and the travel of the wire rope within 10s is 5m, which verifies the effectiveness of the system.

[0058] The system of the utility model can accurately set the preload force of the wire rope according to actual needs. After the system enters a steady state, the average preload force value is equivalent to the set value, the preload force deviation in the oscillation range is controllable, and the preload force system deviation caused by the oscillation is within ±3.9%, which can fully meet the actual use requirements.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A system for monitoring and applying pretensioning force of a wire rope of a lifting mechanism, comprising an unwinding mechanism (1) and a measuring mechanism (2), characterized in that: The unwinding mechanism (1) comprises an unwinding drum (14) and an unwinding motor (12) for applying a resistance torque to the unwinding drum (14); an unwinding encoder (13) for detecting the angular displacement of an output shaft of the unwinding motor (12) is installed at the end of the unwinding motor (12); The measuring mechanism (2) comprises a rope entry wheel assembly, a force feedback rope wheel assembly and a speed measuring wheel assembly which are installed in sequence, and the steel wire rope (6) released by the unwinding drum (14) passes around the rope entry wheel assembly, the force feedback rope wheel assembly and the speed measuring wheel assembly in sequence, and is finally wound on the lifting drum (31) of the lifting mechanism (3); The force feedback rope wheel assembly has an axle pin sensor (27) for detecting the pre-tightening force of the steel wire rope (6), and the speed measuring wheel assembly has a guide rope wheel encoder (28) for detecting the linear speed of the steel wire rope (6); The unwinding motor (12), the unwinding encoder (13) and the axle pin sensor (27) are all electrically connected to the frequency converter (102), the frequency converter (102) is electrically connected to the controller (101), and the controller (101) is also electrically connected to the guide rope wheel encoder (28) and the host computer (100).

2. A hoisting mechanism wire rope preload monitoring and application system according to claim 1, characterized in that: The unwinding mechanism (1) also includes an unwinding frame (11), an unwinding drum (14) is rotatably mounted on the unwinding frame (11), an unwinding motor (12) is fixedly mounted on the end of the unwinding frame (11), and the output end of the unwinding motor (12) is drivingly connected to the shaft end of the unwinding drum (14) through a coupling assembly (15), and the unwinding motor (12) is also equipped with an electromagnetic brake.

3. A hoisting mechanism wire rope preload monitoring and application system according to claim 2, characterized in that: The lifting mechanism (3) also includes a lifting frame (33), a lifting drum (31) is rotatably mounted on the lifting frame (33), a lifting motor (32) is fixedly mounted at the end of the lifting frame (33), and the output end of the lifting motor (32) is drivingly connected to the shaft end of the lifting drum (31).

4. A hoisting mechanism wire rope preload monitoring and application system according to claim 3, characterized in that: It also includes an unwinding transverse movement mechanism (4) for driving the unwinding mechanism (1) to move axially along the unwinding drum (14) and a lifting transverse movement mechanism (5) for driving the lifting mechanism (3) to move axially along the lifting drum (31); The unwinding transverse movement mechanism (4) and the lifting transverse movement mechanism (5) adopt a transverse movement mechanism with the same structure, the transverse movement mechanism comprising a transverse movement base frame (41), a transverse movement driving motor (42) installed at the end of the transverse movement base frame (41), and a transverse movement lead screw (43) rotatably installed on the transverse movement base frame (41), and the output end of the transverse movement driving motor (42) is drivingly connected to the end of the transverse movement lead screw (43); The unwinding frame (11) of the unwinding mechanism (1) is slidably fitted on the corresponding transverse moving base frame (41), and a nut seat (44) is installed at the bottom of the unwinding frame (11), and the nut seat (44) is sleeved on the corresponding transverse moving lead screw (43) through threaded fitting; The lifting frame (33) of the lifting mechanism (3) is slidably matched on the corresponding transverse moving base frame (41), and a nut seat (44) is installed at the bottom of the lifting frame (33), and the nut seat (44) is sleeved on the corresponding transverse moving screw (43) through threaded matching.

5. A hoisting mechanism wire rope preload monitoring and application system according to claim 1, characterized in that: The measuring mechanism (2) comprises a measuring frame (21), on which a plurality of fixed supports (22) are fixedly mounted, and on which a sliding seat plate (29) is slidably mounted, and on which a plurality of movable supports (291) corresponding to the fixed supports (22) are fixedly mounted; The rope entry wheel assembly comprises a rope entry wheel disc (24), one end of the central axis of the rope entry wheel disc (24) is limitedly inserted in a corresponding fixed support (22), and the other end of the central axis of the rope entry wheel disc (24) is movably inserted in a corresponding movable support (291); The force feedback pulley assembly comprises a force feedback wheel disc (25), the center of the force feedback wheel disc (25) is sleeved on the shaft pin sensor (27), one end of the shaft pin sensor (27) is limitedly inserted in the corresponding fixed support (22), and the other end of the shaft pin sensor (27) is movably inserted in the corresponding movable support (291); The tachometer wheel assembly comprises a tachometer wheel disc (26), one end of the central axis of the tachometer wheel disc (26) is limitedly inserted in a corresponding fixed support (22), the other end of the central axis of the tachometer wheel disc (26) is movably inserted in a corresponding movable support (291), and a guide rope wheel encoder (28) is installed on the side wall at a corresponding position of the fixed support (22) for detecting the angular displacement of the central axis of the tachometer wheel disc (26).

6. A hoisting mechanism wire rope preload monitoring and application system according to claim 5, characterized in that: The measuring frame (21) is provided with an installation slot (211), a sliding screw (212) is rotatably installed in the installation slot (211), a sliding drive motor (213) is fixedly installed at the end of the measuring frame (21), the output end of the sliding drive motor (213) is drivingly connected to the end of the sliding screw (212), the sliding screw (212) is fitted with a sliding nut seat (214) through threaded matching, and the sliding nut seat (214) is fixedly installed at the lower end of the sliding seat plate (29).

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